Hydrochloric Acid Recycling

Why and how to recover chlorine from hydrochloric acid

Chlorine is used as an oxidizing agent in several organic processes and hydrogen chloride is often generated as a by-product or co-product.

The recovery of chlorine from hydrogen chloride or hydrochloric acid has several advantages:

  • It shows general commitment in terms of sustainability, careful use of resources and therefore ecological responsibility.
  • Business is made independent from chlorine and hydrochloric acid prices.
  • Avoids the need to develop traditional chlor-alkali plants with significantly higher investment costs.
  • Interesting for regions with high chlorine demand or excess caustic soda (NaOH); use of a chlor-alkali plant would not be expedient due to further NaOH production in saturated markets.
  • Eliminates the risks of chlorine transports (as a further alternative).
  • No costs related to hydrochloric acid neutralization or disposal.

thyssenkrupp Uhde Chlorine Engineers offers two different hydrochloric acid electrolysis processes for the recovery of chlorine from hydrogen chloride:

  • Membrane electrolyzer technology using the oxygen-depolarized cathode (ODC).
  • Diaphragm electrolyzer technology.

Video HCl ODC electrolysis for chlorine recovery

HCl-ODC

HCl-ODC